Fire-alarm.



C. B. & M. C. EASTMAN.

FIRE ALARM.

APPLICATION FILED JULY 3, 1913.

2 SHEETS-SHEET l.

me/whom@ C Bl-cw man fb E H H l 79/ 7 Il' g 21- .'f o 6 l; U@ i@ o E T E:

O l O |I v [I :.5: I4 7] 4' L i I: ff 70 ....g 1211,. 'I :i

76 i, 76 l? 01;; I? 5S o 55.45 o

Q i|20 8 T l I; I 2. H l? l h C. B. 6a M. C. EASTMAN.

FIRE ALARM.

APPLICATION FILED JULY a, 1913.

1,125,674, Patented Janv.19,1915.

2 SHEETS-SHEET 2.

, me/Mofas 1 3E cmzman We Easmm @wi/humaan A 11M u v Dy STATESATENT FFICE. L

CHARLES 1B. EASTMAN AND, MINOT C. EASTMAN, 0F GEORGETOWN, Bti:A .SSA(}HJ'S'.E'1".ES.y

FIRE-ALARM.

- Specification-ot Letters Patent. lPafigempted Jan; 19, 1915.

Application filed July 3,1913. Serial No. 777,268.

To all whom z't may concern.

Be it known that we,"CHAnLEsB. EAST MAN and MINoT C. EASTMAN, citizens of the United States, l the (county of Essex and State of Massachusetts, have invented certain new anduse- 'ful Improvements in Fire-Alarms; and we do hereby declare the following to be a full, clear, and exact description of the invention, suchas will enable others skilled in the art to which it appertaiins to make anduse' the Same.

improvements in automatic fire alarms, and has for ,its object to provide a device which .will indicate a fire in any part of a building, by means of electrical connections. i

#Another object of our invention is to promay be connected to signal in several 'different places at the same time, should a` fire occur in any part of a building.

Another obgect of our invention is toprovide a casing having a source of electrical supply and the Contact points' therein, thus forming'a compact device which may be located at any desirable point.

With the above and other objects in view,

' we will' now proceed to describe our invenproved iire alarm,

tion inthe following specification and accompanying drawings, in which,

Figure 1 is a view in elevation of our imshowing the bell in place; Fig. 2 is a view similar te Fig. 1, as it would appear with the front late removed; Fig. 3 is valongitudinalsectlonal view taken on VlineB-I of Fig. 2;V Fig. 4 is an enlarged transverse sectional View taken on line 4 1 of Fig. 2 Fig. 5 is a detail view of the wiring connections; Fig. 6 is a detail end view of one of the slides; Fig. 7 is a detail eleva-4 tional view of the pulley; Fig. 8 is 'an edge viewof the pulley. l

Referring to the drawings by characters of reference, -1 indicates generally the casing forming the main 'part of ourimproved ire alarm. This casing preferably comprises the end walls 2, the side walls 3, the bottom 4 and the cover 5. intermediate the side walls, we preferably provide a division wall 46, which separates the battery section from the contact section. This wall 6 extends longitudinally through the middle of the box and throughout its enti-re length.

A source of electrical supply, preferably batteries indicated at 7 and 8, respectively,

residing at Georgetown, in

This invention relates to new and useful vide a device ofthe above character whichv is provided and adapted' to pass through the switch indicated y bel of any preferred type. clearly illustrated in Fig. 2 of the drawings, is interposed between the zinc pole of one cell and the carbon pole of the other cell, so that when the device is in operation the batteries are connected in series through the medium of the switch 9. The minals of the. batteries 'are connected, as clearly illustrated in Fig. 2, through the cir'- cuit closers contained in 'the section of the boX opposite the batteries. .As will be clearly seen upon referring to Fig 2, the carbon pole of the cell referred to as 7 is connected through the medium of the wires 10 to the plates of the circuit closer. The spring ycontacts of the circuit closer which .coperate with the plates when the device is opposite ter-`r` generally at 9 which may This switch, as

1n operation are connected tothe suitable forward and is connected directly to the bell i 12,v without passing through any 'circuit closers or other connections.

r1he circuit closing'mechanism of our improved fire alarm preferably comprises a longitudinally slidable member 13, which is provided at each extremitywith the lqshaped portions 14, these portions la being adapted to limit the longitudinal movement of the slide 13 by coming in contact with the transverse strips 15 secured to the bottom 4 of the box. sliding block 16 is ixedly mounted upon the slide 13 and is provided upon its upper side with a cam surface 17, preferably segmental in contour and provided with a metallic plate y18. 'Each metallic plate 18 is adapted to contact at either end with a spring 19, through which the current on its way through the circuit vcloser passes. .Each spring 19 coperates with a plate 20, against which the finger 21 of the spring is pressed, by means of the metallic plate 18 carried on the sliding block '16. The ends of the sliding block are preferably recessed, as clearly illustrated atv22, and adapted to receive the ends 23 of the springs 24:. A suitable pin 25 passes'transversely through each recess 22 and is adapted to extend slightly beyond the extremity of the block 16 and into an aperture formed in the sliding member 13, as

clearly illustrated in Fig. 3. This pin 25 is adapted to be surroundedby the end 23 erative relation tothe sliding` block iti.. The end of the spring .24, opposite the end 23, is

- preferably provided with an eye 26 which is y adapted to receive theend of the cord 27, by

means of which the device is actuated. The cords 27 extend out of the box, as is clearly illustrated, and pass over the pulleys, indicated generally at 28, thesecords' being adapted to enter different parts of the building and have weightsattached to their ends, by means'ofwhich they are kept atall times taut, so that yat any tlme, should any cord extending from .the springs 24, pulling v against the tension yof the weights be burned,

said cord will be released and cause the sliding block otfthe circuit closer to press the spring fingers of the member 19 forward and .into contact with the plate 2 0, thereby le' completing the circuitftev causethe alarm clearly shown in Fig. 8, between which the"v bell to ring. The pullevs referred to generally as `28 are vclearly illustrated in Figs. 7 and 8, and preferably comprise the body portion 29, having formed at one extremity thereof a point 30 which is adapted to be driven into the wall of a building. The opposite terminal of the body portion 29 is bent back upon itself, as clearly illustrated at 31, and forms a itl-shaped member, as

pulley 32 is rotatably mounted on its axle 33. A. suitable aperture 34 is provided in the portion 31, and is adapted to receive a nail or tack, by means of which the device is more securely held in place. l

in use, the box lis placed at any desired point in a building and the cords 27 pass outwardlytherefrom. these cords 27 being carried along the ceiling, by means of the pulleys 28, and are provided at their terminals with Weights 35 which are adapted to keep the cords taut at all times and also keep the springs 24 extended. lt will bey clearly seen that, should a fire break out in any part of the building and the cord burn through the springs will cause the. cord to be pulled, thereby causing the cam face of the sliding block 16 to force one of the fingers 21 of the spring 19 forward and in contact with the plate 20, thus completing a circuit throughl 5() tion, what we claim iszi.. in a device et the characterdescribed,

Having thus fully described our' ,inven I nieuwe a casing, a wall intermediate the sides of said casing and extending longitudinally therethrough, said wall adapted to form chambers, batteries located in one of said chambers, circuit closers in the other ot said chambers, the negative pole oi one of said batteries being connected with the circuit closers, a switch secured to the exterior of the casing and connected tothe positive pole of the aforesaid battery, a bell secured to the front walll ot said casing, one polehof said -bell being connected to the ositive pole of the second battery, the negative pole of the second mentioned battery being connected to the pole of the switch opposite the first mentioned pole, the pole of the bell opposite the one connected withv the positive pole of the battery being connected with the circuit closer, whereby when said circuit closer is actuated the circuit through the bell, battery, circuit closer and switch will be complete.

2. A device of the character described including a casing, circuit closer within the casing, a pair ot batteries within the casing, an electricallyoperated signal on the front of the casing, a switch on one of theside walls of the casing, a wire connecting one pole of one ef the batteries to ene pole of the switch, the opposite pole ot said battery being connected to one pole offthe second closer, a wire connecting the opposite pole of the circuit closer to one pole oi the si al, a wire connecting the opposite pole ot the signal to the pole of the second battery cp-l posite the one to which the-second closer is connected, and a wire connected te the op= posite pole .of the second battery to the re'- maining pole oi the switch.

3'. device of the character described in cluding a casing,a circuit closer within the casing, a pair ot batteries within the casing, a switch on the casing, a bell on the casing, a wire connecting the positive pole ot one of me the batteries to one pole ot the switch, a wire connecting the negative pole ot the second battery to the switch, a wire connecting the negative pole ot the first battery to one pole of the circuit closer, a wire con- 11e necting the remaining pole ot the circuit closer to one pole ot the bell, and a wire connecting the remaining pole ot the bell to the positive pole of the second battery.

ln testimony whereof we aiiix our signa@ 11b tures in the presence et two witnesses.

CHARLES B. ESTMAN. MNT C. EASTMAN.

`Witnesses:

littrssntn S. HYDE, Enwann F. McLAnumaN. 

